Geoegb wilkinson and james mccotjet



(N0 Modei.)

G. WILKINSON 80 J. MGCOURT.

EARTH SGRAPBR.

No. 380,374. Patented Apr. 3, 1888..

UNITED STATES PATENT EErcE.

GEORGE WILKINSON AND JAMES MCCOURT, OF AOAMPO, CALIFORNIA.

EARTH-SCRAPER.

SPECIFICATION forming part of Letters Patent No. 380,374, dated April 8, 1888.

Application filed September 30, 1887. Serial No.25l,144. (No model.)

To aZ-Z whom it may concern.-

Be it known that we, GEORGE WILKmsoN and JAMES McGoURr, citizens of the United States, residing at Acampo, in the county of San Joaquin, State of California, haveinvented certain new and useful Improvements in Three- Wheel PlatformScrapers, of which the following is a specification, reference being bad therein to the accompanying drawings.

Our invention relates to certain improvements in that class of earth-scrapers used for grading and leveling off land and for ditching purposes; and it consists in the combination of certain parts, as hereinafter explained, and pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a right-hand side elevation of our scraper, the dotted lines thereon representing the position of the lever, 850., and of the scraper when elevated and in a position of discharge. Fig. 2 is a plan of the same.

The platform A is suitably mounted in front bearing-wheels, A, the rear of such platform being supported by a trail-wheel, A. A rod, G, is rigidly attached at a point near the front of the platform, and has forwardly-extending flexibly-attached adjustable arms 13, to which are flexibly attached the scraper B, whose position and operation are controlled by a system of levers composed of a bail, B, attached to the scraper, and having attached to it at its center a lever, D, whose fulcrum is a vertical forked post, (I, attached at the front of the platform A to a center bar, a, to the rear of which is attached a foot, I), to which is attached flexibly a notched vertical post, D which engages with the rear of the lever D by means of a spring detent-handle, D.

By means of the above-described leverage devices the scraperB is raised and lowered vertically, and in connection with an auxiliary-lever device, which will now be described, controls the position and operation of the scraper B. This auxiliary-lever device consists of a vertical lever, E, attached to the bar a forward of the post D and connected by a bar, E, with the center of the rear edge of the scraper B. This bar E passes through the forks of the post d, such forks acting as 0 a guide thereto. The position of the lever E is controlled by a spring thereon engaging with the notches of a notched half-circle, E", attached to the bar a. The hounds of the pole C, to which the team is attached, are attached to the sides of the scraper A. The distance of the scraper from the platform may also be regulated by changing the position-0f the straps F upon the rod G, there being perforations in such straps for that purpose.

To operate the scraper the same is vertically adjusted by the lever D. The scrapers angle to the soil is regulated by the lever E. When the load is secured, it may be discharged by raising it by means of the lever D; or the lever E may be depressed rearwardly, raising the edge of the scraper with its load, and the rear of the lever D, being depressed, raises the scraper and its load for transportation to any desired point.

Having thus described our invention, what we claim as new is- 1. A mounted scraper composed of the platform A, suitably mounted on the wheels A A, and provided with the longitudinal bar a, the scraper B, provided with poleand hounds O and bail B, and a suit-able system of lovers for controlling the operation and position of the scraper, all combined and operating as set forth.

2. The scraper B, attached to the front of the platform A by means of the adjustable arms F, and its bail B, in combination with the levers D and E, suitably attached to the scraper, the fulcrum of the lever D being a vertical forked standard, (1, attached at its foot to the bar a, attached longitudinally to the center of the platform A, all as herein described and set forth.

3. The combination, substantially as described, of the platform A, mounted on the wheels A at its front end, the trail-wheel A at its rear, the longitudinal bar a, the foot I), the forked post at, the arms F, the scraper B and its bail B, the tongue and hounds O, and suitable lever devices for controlling such scraper from the platform A.

4. The platform A, suitably mounted, and having the scraper attachment B B O attached at its front end by the adjustable arms F, attached to the cross-rod G, in combination with such cross-rod and with the foot-piece b, In testimony whereof we affix oursignatures having the vertical post D attached thereto, in presence of two Witnesses.

such post engzwin with the lever D having its fulcrum at the apex of the forked post d, GEORGE WILKINSON 5 secured to the longitudinal bar a, secured to MOGODRT' the platform A, the rod E, and the lever D, Witnesses: being suitably connected with the scraper B JOSHUA B. WEBSTER,

B, all as shown and described.

CHAS. H. WYMAN. 

